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PA0
PA1
PA2
PA3
PA4
PA5
PA3
A
A
C63
1000PF
1
2
3
4
5
6
7
8
9
J6
EXT.
TXP1
TXP2
TXP3
RXP1
RXP2
RXP3
A
1 3
2
FL21
OP2
OP0
IP2
IP0
TI1
5
TI2
18
TI3
19
TI4
21
TO1
2
TO2
1
TO3
24
TO4
20
RO2
4
RO3
22
RO4
17
RI2
3
RI3
23
RI4
16
RO1
6
RI1
7
C1+
10
C1-
12
C2+
13
C2-
14
V+
11
V-
15
GND
8
VCC
9
U18
MAX238
TXDA
RXDA
P1P2
QADS[0..31]
QADS[0..31]
+5V
OUT
8
VCC
14
GND
7
NC
1
Y3
3.6864MHZ
+5V
+5V
1
2
U31A
74F06
+5V
R146
475
3
4
U31B
74F06
R145
475
H3
1
R143
3.32K
12
J11
GWR2
RST25_2
IP0
IP1
IP2
IP3
QADS2
QADS3
QADS4
QADS5
+5V
+5V
D42
G51
R142
3.32K
12
J14
RS4
7
RS3
6
RS2
4
RS1
2
IP5
42
IP4
43
IP3
3
IP2
40
IP1
5
IP0
8
X1/CLK
36
X2
37
IACK
41
R/W
9
RESET
38
CS
39
RXDB
11
RXDA
35
VCC
44
GND
22
D7
21
D6
25
D5
20
D4
26
D3
19
D2
27
D1
18
D0
28
OP7
17
OP6
29
OP5
16
OP4
30
OP3
15
OP2
31
OP1
14
OP0
32
DTACK
10
IREQ
24
TXDB
13
TXDA
33
NC
1
NC
12
NC
23
NC
34
U29
68681
OP0
OP1
OP2
OP3
+5V
+5V
DRS0
DRS1
DRS2
DRS3
DRS4
DRS5
DRS6
DRS7
R144
3.32K
CK25-4
+5V +5V
+5V
D
12
Q
9
CK
11
Q
8
P
R
1
0
C
L
1
3
U56B
74F5074
C52
H4
5
R139
3.32K
PACK1
B5
5
C12
1UF
C14
1UF
+5V
+5V
A
A
1 3
2
FL19
1 3
2
FL22
1 3
2
FL24
C10
1UF
C13
1UF
PA4
PA2
PA0
A
A
C64
1000PF
C61
1000PF
PA5
PA1
A
A
C67
1000PF
C62
1000PF
C68
1000PF
A
A
1 3
2
FL20
1 3
2
FL23
SCLKIN
+5V
IRQRS1
D
2
Q
5
CK
3
Q
6
P
R
4
C
L
1
U30A
74F5074
TP2
RTSB
TXDA
TXDB
5 6
U31C
74F06
RSCS1
RXDA
RXDB
DRS0
DRS1
DRS2
DRS3
DRS4
DRS5
DRS6
DRS7
DRS0
DRS1
DRS2
C15
A1
2
B1
18
A2
3
B2
17
A3
4
B3
16
A4
5
B4
15
A5
6
B5
14
A6
7
B6
13
A7
8
B7
12
A8
9
B8
11
G
19
DIR
1
U136
74FCT2245
DB24
DB25
DB26
DB[0..31]
+5V
CK3
C5
5
1
2
3
4
5
6
7
8
9
10
R328
4.7K
DB[0..31]
H1
1
C2
5
CK3
DB27
DB28
DB29
DB30
DB31
RSEN
QADS2
QADS3
QADS4
QADS5
DRS3
DRS4
DRS5
DRS6
DRS7
GWR2
RS4
7
RS3
6
RS2
4
RS1
2
IP5
42
IP4
43
IP3
3
IP2
40
IP1
5
IP0
8
X1/CLK
36
X2
37
IACK
41
R/W
9
RESET
38
CS
39
RXDB
11
RXDA
35
VCC
44
GND
22
D7
21
D6
25
D5
20
D4
26
D3
19
D2
27
D1
18
D0
28
OP7
17
OP6
29
OP5
16
OP4
30
OP3
15
OP2
31
OP1
14
OP0
32
DTACK
10
IREQ
24
TXDB
13
TXDA
33
NC
1
NC
12
NC
23
NC
34
U39
68681
+5V
MIRQ3B
+5V
DRS0
H2
6
R174
3.32K
CK25-4
CK3
+5V
+5V
D
12
Q
9
CK
11
Q
8
P
R
1
0
C
L
1
3
U72B
74F74
D
2
Q
5
CK
3
Q
6
P
R
4
C
L
1
U56A
74F5074
CK3
OP3
OP1
IP3
IP1
TI1
5
TI2
18
TI3
19
TI4
21
TO1
2
TO2
1
TO3
24
TO4
20
RO2
4
RO3
22
RO4
17
RI2
3
RI3
23
RI4
16
RO1
6
RI1
7
C1+
10
C1-
12
C2+
13
C2-
14
V+
11
V-
15
GND
8
VCC
9
U17
MAX238
RXDB
TXDB
SYNCK3
E5
5
E1
5
C8
1UF
C11
1UF
TXB1
TXB2
TXB3
RXB1
RXB2
RXB3
+5V
+5V
A
A
A
1 3
2
FL14
1 3
2
FL18
C9
1UF
C7
1UF
PB0
PB2
PB3
PB4
PB5
PB3
PB4
PB1
A
A
A
A
C60
1000PF
C56
1000PF
1
2
3
4
5
6
7
8
9
J5
EXT.
PB2
PB0
PB5
A
A
C59
1000PF
C57
1000PF
OPTIONAL
A
A
C51
1000PF
1 3
2
FL15
1 3
2
FL17
1 3
2
FL13
1 3
2
FL3
PACK2
KEYD
+5V
KEYD
E4
5
TP5
TP
R112
10.0K
CLKIRQ
CK25-4
+5V
+5V
+5V
+5V
D
12
Q
9
CK
11
Q
8
P
R
1
0
C
L
1
3
U30B
74F5074
+5V
1
2
U32A
74F04
9
8
U31D
74F06
F4
5
H4
5
R172
3.32K
TXRDY
RXMASK
+5V
IRQRS2
DRS1
DRS2
DRS3
DRS4
DRS5
DRS6
DRS7
E5
5
R175
3.32K
RSCS2
TXCLK
RXCLK
GWR2
RST25_2
TXRDY
KEYD
RXMASK
+5V
E5
C5
5
C1
5
+5V+5V
13 12
U31F
74F06
R149
475
11 10
U31E
74F06
R148
475
9
8
U32D
74F04
11 10
U32E
74F04
13
12
U32F
74F04
VCC
+5V
R173
33.2
5
6
U32C
74F04
SDATIN
RXMASK
TXRDY
+5V
3 4
U32B
74F04
+5V
R254
100
A A
C5
C5 5
C272
1000PF
R253
4.75K
CR8
CR7
1 3
2
FL25
+5V
+5V
A
A
C47
47PF
C2
10UF
C49
.01UF
1 3
2
FL27
1 3
2
FL26
A A
A A
AA
A
A
C52
47PF
C48
.1UF
1 3
2
FL16
PB1
1
2
3
4
5
6
J4
A
A
C58
1000PF
C55
1000PF
A
A
A
A
1
2
3
4
5
6
7
8
9
J1
REMOTE
TO EXT.
KEYBRD
A A
C50
1000PF
1 3
2
FL2
KEYCK
A
R140
10.0K
A
E14
C306
1000PF
R3
1.00K
+5V
A
A
C303
1000PF
C304
1000PF
C305
1000PF
C273
.01UF
+5V
Q1
+5V
R99
1.50K
R98
4.75K
R97
4.75K
C42
.01UF
R2
26.7
1
6
18
4
69
1
3
1
1
K1
CR1
BKEN
GND
H3
6
KEYBOARD INTERFACE
AM 700
A
RS232C INTERFACE 10
PART OF A6 MAIN/CPU BOARD